Sash-lock.



W. H. DOW.

SASH LOGK.

APPLICATION FILED MAY 20, 1910.

Patented Mar. 21,1911.

Inventor Attorneys time Afth

ear

f. FEIQE.

SASI-I-LOCK.

To all whom it may concern.-

l 3e it known that I, VVILLIAM H. Dow, a citizen of the United States, residing at Burlington, in the county of Chittenden and State of Vermont, have invented a new and useful Sash-Lock, of which the followmgis a specification.

This invention relates to sash locks, one of its objects being to provide a simple device of this character adapted to be readily at tached to a window sash and which serves to securely lock the sash in any position to which it may be shifted, the said lock also serving as a means for preventing the sash from rattling.

A further object is to provide a lock which can be readily reached and operated and which cannot be tampered with by persons outside of the window.

With these and other objects in view the lnvention consists of certain novel details of construction and combinations of parts hereinafter more fully described and pointed out in the claims.

In the accompanying drawings the preferred forms of the invention have been shown.

In said drawings :Figure 1 is a front elevation of the sash lock in position upon a sash, a portion of said sash and of the window casing being shown, part of said casing being illustrated in section. Fig. 2 is a section on line AB Fig. 1. Fig. 3 is a perspective view of a modified form of guide for use in connection with the lock.

Referring to the figures by characters of reference 1 designates a window sash and 2 designates the window casing in which it is mounted, there being a recess 3 formed within the casing and adjacent the lower portion of the sash.

The fastener designed to be used upon the sash consists of a metal strip 4; made up of diverging arms merging into a central rounded portion 5, said arms being located preferably at about 135 degrees to each other and each terminating at its free end in an eye 6 adapted to receive a fastening screw 7 or the like. A retaining spring 8, preferably formed of wire, has terminal eyes 9 engaging the fastening devices 7, this spring being bowed longitudinally so that its intermediate portion lies close to the casing 2. A roller 10 is loosely mounted be- Specification of Letters Patent.

Application filed May 20,

Patented Mar. 21, 1911.

1910. Serial No. 562,475.

i tween the guide strips and the casin 2 and extends between the spring 8 and sash 1.

lVhen the sash is in its closed position, the roller 10 can'be moved between the lower arm 1 and the casing 2 and will then become seated within the recess 3. Should an effort be made to raise the sash while the parts are thus positioned, the roller will become wedged between the casing 2 and the lower arm t and bind the parts together to such an extent as to positively prevent the sash from being shifted. The recess 3 is merely provided for the purpose of positively preventing the roller 10 from slipping. It will be understood, however, that the sash can be supported in raised position by simply shifting the roller 10 between the upper arm 4 and the casing 2 so that the weight of the sash will cause said upper arm to press downwardly on the roller and force it into frictional engagement with the casing 2. In other words the roller will become wedged between the casing and the upper arm, this wedging action increasing in proportion to the weight applied to the roller. The spring 8 serves not only to retain the roller in proper position between the arms and the casing but also bears with sufficient pressure upon said roller to hold it at any desired point between the arms and the casing while the sash is being shifted.

Instead of utilizing a separate spring 8, as shown in Figs. 1 and 2, the structure shown in Fig. 3 may be employed. In said structure the diverging arms have been indicated at 11 and are connected at their spaced ends, by an integral strip 12 which serves to retain the roller against lateral displacement and also bears against it with suflicient pressure to hold it in adjusted position.

As shown in the drawings, the roller 10 has a recess in its outer or exposed face, this recess being sufficiently large to receive the end of a finger whereby the shifting of the roller is facilitated.

Various changes can be made in the construction and arrangement of the parts without departing from the spirit or sacrificing any of the advantages of the invention as defined in the appended claims.

What is claimed is l. A sash fastener including diverging guide arms, a casing engaging roller loosely mounted between the said arms, and yield ing means connecting the free ends of the arms for pressing the roller against the sash to which the arms are secured and for holding the roller against lateral displacement.

2. The combination with a window casing and a sash mounted therein, of a fastener including diverging deflecting arms detachably secured to the sash, a roller interposed between said arms and the casing and shiftto hold it in adjusted position between the arms.

3. A sash fastener including diverging deflecting arms, there being fastener receiving openings in the free end portions of the arms, a spring connecting said end portions, and a roller loosely mounted between the arms and contacting with the spring.

In testimony that I claim the foregoing as my own, I have hereto affixed my signaable by the arms into engagement with the ture in the presence of two witnesses.

casing, there being a roller receiving recess in said casing and means connected to the arms and contacting with the roller to hold said roller against lateral displacement and WILLIAM H. DOXV. WVitnesses M. C. GRANDY, GILBERT A. Dow.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents. Washington, D. G. 

